Eider (Somateria mollissima)

Eider (Somateria mollissima)
Name	Eider
Status	LC
Status system	IUCN3.1
Genus	Somateria
Species	S. mollissima
Authority	(Linnaeus, 1758)

Eider (Somateria mollissima) The eider (Somateria mollissima) is a large sea duck in the family Anatidae notable for its dense down, colonial nesting, and coastal distributions. First described by Carl Linnaeus in 1758, the species has been the subject of natural history accounts by figures associated with Charles Darwin and exploration narratives from the eras of James Cook and Fridtjof Nansen. Eiders have cultural and economic significance in regions linked to Iceland, Greenland, Norway, Russia, and Canada.

Taxonomy and naming

Somateria mollissima was named in the 10th edition of Systema Naturae by Carl Linnaeus, placing it within Anatidae alongside genera noted by John James Audubon and Thomas Bewick. Subspecies historically recognized include S. m. mollissima, S. m. dresseri, S. m. borealis and S. m. v-nigrum, with taxonomic treatments debated in works connected to Ernst Mayr, Joel Asaph Allen, and modern revisions by institutions such as the British Ornithologists' Union and the American Ornithological Society. Vernacular names in English, Norwegian, Icelandic and Greenlandic reflect cultural ties to coastal communities and voyages documented during the Age of Discovery.

Description

The eider is among the largest sea ducks, comparable in size discussions to species treated by Alexander Wilson and featured in plates by John Gould. Adult males in breeding plumage display a distinctive black and white pattern with green nape markings discussed in field guides from the Royal Society for the Protection of Birds and the Audubon Society. Females have cryptic brown plumage similar to descriptions by Edward Lear and illustrations in texts by Philip Henry Gosse. Morphological traits—bill shape, wing chord and body mass—are measured using standards from museums such as the Natural History Museum, London and the Smithsonian Institution, and sexes exhibit size dimorphism noted in comparative studies by David Lack.

Distribution and habitat

Eiders breed in circumpolar coastal zones adjacent to bodies of water featured in exploration records like the North Atlantic Ocean, Arctic Ocean, and the Bering Sea. Breeding colonies occur on islands and skerries in regions governed historically by Kingdom of Norway, Kingdom of Denmark (including Greenland), and the Russian Empire territories recorded in polar expeditions by Vitus Bering. Wintering movements extend to coastal waters near ports and cities such as Reykjavík, Bergen, Murmansk, and the eastern Canadian shorelines of Newfoundland and Labrador. Habitats include rocky islets, sheltered bays and estuaries studied in conservation assessments by agencies like the International Union for Conservation of Nature and national bodies including Environment Canada.

Behavior and ecology

Eiders are gregarious, forming flocks documented in natural history accounts by John James Audubon and observational studies led by institutions such as the British Trust for Ornithology and the U.S. Fish and Wildlife Service. Foraging behavior—diving and benthic feeding on bivalves, crustaceans and gastropods—has been examined in ecological research associated with universities like University of Cambridge and University of Oslo. Predation and interspecific interactions involve species notable in Arctic ecology such as Arctic fox, Glaucous gull, and White-tailed eagle, with colony dynamics compared in papers influenced by concepts from Rachel Carson and G. Evelyn Hutchinson. Movement ecology integrates telemetry methods developed at centers like the Max Planck Institute.

Reproduction and lifecycle

Eider nesting is colonial, with females creating nest scrapes lined with down—a behavior chronicled in accounts by Ernest Thompson Seton and modern ornithologists linked to the Norwegian Institute for Nature Research. Clutch size, incubation length and duckling development follow patterns detailed in field studies from the University of Copenhagen and the Canadian Wildlife Service. Philopatry, brood amalgamation and brood-rearing strategies are topics in life-history research referencing frameworks by Robert MacArthur and E. O. Wilson. Annual survival rates and age-specific fecundity figures are incorporated into demographic models used by conservation agencies including IUCN assessments.

Conservation status and threats

The eider is listed as Least Concern on global assessments by the IUCN Red List, though regional trends show declines addressed in reports by BirdLife International and national agencies such as Fisheries and Oceans Canada. Threats include oil spills with historical precedence in incidents like the Exxon Valdez case, habitat change from coastal development near municipalities such as Murmansk Oblast and Newfoundland and Labrador, and bycatch issues documented by organizations like the International Maritime Organization and fisheries regulators. Conservation measures span protected areas established under frameworks connected to the Ramsar Convention and national legislation in Norway, Iceland, and Canada.

Relationship with humans

Humans have long utilized eider down for insulation and bedding, a practice institutionalized in communities of Iceland and Greenland and featured in ethnographic records by explorers like Knud Rasmussen. Traditional eiderdown harvesting is managed in cooperative systems reminiscent of resource schemes discussed by economists influenced by the Ostrom studies and regulated by local authorities tied to the Government of Iceland and indigenous governance bodies in Nunavut. Cultural representations appear in art and literature associated with figures such as John Constable and collections held by the Victoria and Albert Museum. Contemporary ecotourism, birdwatching and scientific research engage stakeholders including the RSPB, BirdLife International and regional wildlife services.

Category:Somateria Category:Birds described in 1758